JP5451269B2 - Method for producing mold using wax pattern or resin pattern and centrifugal burying apparatus used therefor - Google Patents

Description

  The present invention relates to a mold manufacturing method using a wax pattern or a resin pattern, which is mainly used for casting a dental restoration or a noble metal decoration, and a centrifugal burying apparatus used therefor.

  Precision casting using a wax pattern is commonly used in the manufacture of dental restorations and precious metal ornaments. In addition, a technique for forming a cavity by forming a pattern with a resin instead of wax and incinerating the pattern has been developed. A conventional lost wax casting method will be described with reference to FIG. Reference numeral 10 shown in FIG. 12 indicates a wax pattern that is a prototype of a dental casting as an example. The wax pattern 10 is placed on the truncated cone 14 via the spool wire 12 ((I) in FIG. 12). The spool wire 12 is a material for forming a runner. A cylindrical casting ring 16 is then installed on the truncated cone 14 on which the wax pattern 10 is installed, and the periphery of the wax pattern 10 is surrounded by the casting ring 16 ((II) in FIG. 12).

  Separately, investment material is prepared. The types of investment materials can be classified into gypsum-based investment materials and non-gypsum-based investment materials, and non-gypsum-based investment materials can be classified into phosphate-based investment materials and silica sol-based investment materials. Examples of the silica sol investment include ethyl silicate investment and colloidal silica investment. Patent Document 1 discloses a gypsum-based and phosphate-based investment material. Patent documents 2 to 4 disclose gypsum-based investment materials. Patent Document 5 discloses a phosphate-based investment material.

  The investment material is typically available as a powder investment material in which a refractory material (silica) is a main component and a binder is blended therein. The obtained powder embedding material is used in the state of slurry 18 prepared in a mud form by adding a kneading liquid thereto and kneading.

  If it demonstrates according to a wax pattern method, the slurry 18 prepared beforehand will be filled in the casting ring 16 ((III) of FIG. 12). By filling the slurry 18 into the casting ring 16, the periphery of the wax pattern 10 and the spool wire 12 is surrounded by the slurry 18 ((IV) in FIG. 12). When the slurry 18 is hardened, the truncated cone 14 and the spool wire 12 are removed from the hardened investment material 20 surrounded by the casting ring 16, and the investment material 20 in the casting ring 16 is removed from an electric furnace, a gas furnace, or the like. In the heating furnace, dewaxing is performed (dewaxing step). When the spool line 12 is made of wax, only the truncated cone 14 is removed leaving the wax pattern 10 and the spool line 12. By the dewaxing process, the wax pattern 10 in the investment material 20 is removed, whereby the investment material 20 becomes a mold having a runner and a cavity. A dental casting is formed by casting the molten metal into the mold cavity. When a resin pattern is used instead of the wax pattern method, the resin pattern disappears in the heating furnace instead of dewaxing.

  Several precautions are known when using investment material. For example, it is said that the finer the powder particle size, the better the powder embedding material is for smoothing the casting surface of the casting. Further, it is said that it is preferable to sufficiently defoam using a vibrator when the slurry 18 is prepared and / or when the slurry 18 is filled in the casting ring 16.

JP 2003-286121 A JP 10-1113745 A Japanese Patent Laid-Open No. 11-226695 JP 2001-353166 A Japanese Patent Laid-Open No. 10-296386

  As is well known, the metal material thermally shrinks in the process of being lowered from the molten state to the ambient temperature. For example, the casting shrinkage of gold alloy is 1.4-1.6%, the casting shrinkage of gold-silver palladium alloy is 1.5-1.7%, the casting shrinkage of silver alloy is 1.1-1.3%, the casting shrinkage of cobalt-chromium alloy is 2.1-2.3% The casting shrinkage rate of nickel chrome alloy is said to be 1.9-2.3%. It is known to utilize the expansion of investment material to accommodate the casting shrinkage of this alloy. The rate of expansion of the investment is affected by the mixing ratio of the powdered investment material and the kneading liquid, so it is important to manage the mixing ratio, and the operator must prepare the slurry while paying attention to the mixing ratio. is there.

  An object of the present invention is to provide a mold manufacturing method using a wax pattern or a resin pattern that can facilitate the management of the water mixture ratio when preparing a slurry of investment material, and a centrifugal investment apparatus used therefor. is there.

  A further object of the present invention is to produce a mold using a wax pattern or a resin pattern that can be adjusted to a preferable water mixture ratio even if the control of the water mixture ratio is rough when preparing the investment material slurry. The object is to provide a method and a centrifugal burying apparatus used therefor.

  A further object of the present invention is to provide a mold manufacturing method using a wax pattern or a resin pattern and a centrifugal burying apparatus used therefor, which can produce a cast product with a smooth casting surface without depending on the skill of the operator. There is to do.

According to the first aspect of the present invention, the above technical problem is basically:
After the slurry prepared by adding a kneading solution to the powder investment material of the investment material and kneading is filled in the casting ring and surrounding the wax pattern or the resin pattern with the slurry, after the slurry is cured In the mold manufacturing method of manufacturing the investment material mold by performing a pattern removal process to remove the wax pattern or the resin pattern,
Excess kneading that separates the excess kneading liquid from the slurry by applying centrifugal force to the slurry in the casting ring by rotating the casting ring filled with the slurry along a circumferential path in a lateral position. Japanese liquid separation process;
After the excess kneading liquid separation step, the excess kneading liquid discharging step of discharging the excess kneading liquid in the casting ring from the casting ring;
A slurry curing step for curing the slurry after the excess kneaded liquid discharging step;
This is achieved by providing a mold manufacturing method using a wax pattern or a resin pattern, wherein the pattern removing process is performed after the slurry curing step.

  That is, according to the first aspect of the present invention, a slurry is prepared by kneading powder embedding material and a kneading liquid, and the slurry is filled in a casting ring to surround the wax pattern or the resin pattern with the slurry. The process up to this point is the same as before, but the casting ring filled with the slurry is revolved sideways, and centrifugal force is applied to the slurry in the casting ring, so that the excess kneading contained in the slurry. The liquid is separated from the slurry, and the separated kneaded liquid is discharged from the casting ring.

  According to the present invention, even if an excessive amount of the kneading liquid is added when preparing the investment material slurry, the mixing ratio can be adjusted appropriately by separating the excess kneading liquid by applying centrifugal force. Therefore, management of the water mixing ratio when preparing the investment material slurry can be facilitated. In other words, even when the management of the mixing ratio at the time of preparing the investment material slurry is rough, it can be adjusted to a preferable mixing ratio. Moreover, since the slurry is pressed and hardened by centrifugal force, the surface of the wax pattern or the resin pattern can be faithfully transferred, thereby smoothing the casting surface of the casting made from the casting mold made of the investment material after the slurry is cured. Can be

The above technical problem is, according to another aspect of the invention,
The slurry in which the kneading liquid is mixed into the powder investment material of the investment material is filled in the casting ring, and the wax pattern or the resin pattern installed in the casting ring is surrounded by the slurry. A centrifugal embedding device for separating the excess kneaded liquid from the slurry by applying centrifugal force to the slurry in the casting ring,
A rotating body that is driven to rotate around a central axis linked to an electric motor;
A holder that is swingably provided on the rotating body,
When the casting ring filled with the slurry is attached to the holder, the center of gravity of the casting ring filled with the slurry is positioned lower than the swinging central axis of the holder,
When the electric motor is started and the rotating body is driven to rotate, the casting ring revolves around the horizontal axis in a lateral posture, and centrifugal force is applied to the slurry in the casting ring. This is achieved by providing a centrifugal burying device characterized by:

It is a figure for demonstrating the procedure of the casting_mold | template manufacturing method of an Example. It is a figure for demonstrating the procedure of the casting_mold | template manufacturing method using an ethylene silicate investment material. FIG. 3 is a diagram for explaining the procedure of a mold manufacturing method using an ethylene silicate investment material following FIG. 2. FIG. 4 is a diagram for explaining the procedure of a mold manufacturing method using an ethylene silicate investment material following FIG. 3. FIG. 5 is a diagram for explaining a procedure of a mold manufacturing method using an ethylene silicate investment material following FIG. 4. FIG. 6 is a diagram for explaining the procedure of a mold manufacturing method using an ethylene silicate investment material following FIG. 5. It is a figure for demonstrating the outline | summary of the centrifugal burying apparatus used for the casting_mold | template manufacturing method of an Example. It is a figure for demonstrating that the holder provided in the centrifugal burying apparatus of FIG. 7 can rock | fluctuate centering on a horizontal axis. FIG. 7 is a diagram for explaining the procedure of a mold manufacturing method using an ethylene silicate investment material following FIG. 6. It is a figure which shows the modified example of the holder installed in the rotary body of a centrifugal burying apparatus, and shows the state just before mounting | wearing a holder with an empty casting ring in order to demonstrate the process of installing a casting ring. It is a figure corresponding to FIG. 10, and is a figure which shows the state which mounted | wore the holder with the empty casting ring in order to demonstrate the process of installing a casting ring. It is a figure for demonstrating the procedure of the conventional mold manufacturing method.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

  FIG. 1 is a diagram for explaining the procedure of the mold manufacturing method using the wax pattern of the embodiment. In FIG. 1, the same members as those described above with reference to FIG. In the mold manufacturing method of the embodiment, the wax pattern 10 is placed on the truncated cone 14 via the spool wire 12 and the casting ring 16 is attached, and the muddy-like burial is placed in the casting ring 16 as in the prior art. A material or slurry 18 is filled ((I) and (II) in FIG. 1). The slurry 18 may be any investment material such as a gypsum-based investment material and a non-gypsum-based investment material (phosphate-based investment material, silica sol-based investment material). Next, the cap 22 is attached to the upper end opening of the casting ring 16 ((III) in FIG. 1). The attachment of the cap 22 is not always essential. The cap 22 is preferably provided with an opening 22a in the center, and the slurry can be filled into the casting ring 16 through the opening 22a.

  After the cap 22 is attached, the assembly 26 of the truncated cone 14 and the casting ring 16 is attached to the centrifugal burying apparatus in a state in which the slurry 18 that has not yet been cured is accommodated. Centrifugal force is applied in a state of being placed sideways and from the cap 22 side toward the truncated cone 14 side ((IV) in FIG. 1). The centrifugal embedding apparatus is operated for an appropriate time (for example, 10 minutes) to apply centrifugal force to the slurry 18 in the assembly 26 to separate the excess kneaded liquid from the slurry 18. The surplus kneaded liquid separated from the slurry 18 is located behind the acting direction of the centrifugal force due to the difference in specific gravity with the solid component of the slurry 18, that is, is unevenly distributed on the side of the cap 22 of the lying assembly 26. Become.

  Optionally, before the assembly 26 containing the slurry 18 is attached to the centrifugal burial apparatus, a weight Wt may be placed on the slurry 18 as shown in phantom lines in FIG. 1 (FIG. 1). (II)).

  When the separation of the excess kneading liquid using the centrifugal burial apparatus is completed, the assembly 26 is removed from the centrifugal burial apparatus, and the cap 22 is removed from the casting ring 16, and the assembly 26 is tilted sideways to thereby remove the casting ring. The separated excess kneading liquid (excess kneading liquid separated from the slurry 18 and floated on the slurry 18) present at the upper end of 16 is drained from the assembly 26 ((V) in FIG. 1). The subsequent steps are allowed to stand until the slurry 18 is cured as in the prior art ((VI) in FIG. 1). Next, the truncated cone 14 and the spool wire 12 are removed from the hardened investment material 20 surrounded by the casting ring 16, and the investment material 20 with the casting ring 16 is placed in a heating furnace to perform dewaxing. (Dewaxing process). As a heating furnace used in this dewaxing step, an electric furnace or a gas furnace may be used as in the prior art, but a steam kettle that performs dewaxing using pressurized steam may be used. By using a steam pot, the problem of odor generated when the wax pattern 10 is incinerated using a conventional electric furnace or gas furnace can be solved. When the spool wire 12 is made of a brazing material, the spool wire 12 is removed together with the wax pattern 10 in a dewaxing process. Through the dewaxing process, the investment material 20 becomes a mold having a runner and a cavity, and casting is performed using this mold.

  When the weight Wt is placed on the slurry 18, the weight Wt is removed after removing the assembly 26 from the centrifugal burial apparatus ((V) in FIG. 1).

  With reference to FIGS. 2-9, the Example using an ethylsilicate investment material is described. Reference numeral 30 shown in FIG. 2 is a former, which is a member corresponding to the aforementioned truncated cone 14 (FIGS. 1 and 12). The former 30 has a frustoconical protrusion 30a at the center thereof ((I) in FIG. 2), and a puddle forming material 32 formed into a substantially conical shape with a brazing material on the protrusion 30a. After the installation, the casting ring 34 is installed on the former 30 ((II) in FIG. 2). Of course, after the casting ring 34 is installed on the former 30, the puddle forming material 32 may be installed on the protrusion 30a of the former 30 by inserting a finger from the upper end opening of the casting ring 34. The casting ring 34 is not particularly limited, but may have a two-step upper and lower stepped shape with different diameters, including a lower small diameter portion 34a and an upper large diameter portion 34b (see FIG. (II)).

  Referring to FIG. 3, FIG. 3 is a diagram for explaining a step of primarily filling ethyl silicate investment material into casting ring 34. The ethyl silicate investment material is used in the state of a mud slurry 38 prepared by kneading a powder investment material and a dedicated kneading liquid in a rubber cup 36. In the step of filling the slurry 38 into the casting ring 34, vibration may be applied to the assembly 40 composed of the former 30 and the casting ring 34 with a vibrator (not shown) ((III) to (IV) in FIG. )).

  The primary filling of the slurry 38 is stopped at a height where the bottom of the casting ring 34, preferably the top of the puddle forming material 32 is exposed ((IV) in FIG. 3). When the primary filling slurry 38 is solidified and a base (primary investment material) is formed, a wax pattern 42 is installed on the primary investment material, and the wax pattern 42 and hot water are connected by a spool wire 44 made of a wax material. The pool forming material 32 is connected ((V) in FIG. 4). When the spool wire 44 is made of a non-wax member (for example, a wire), the spool wire 44 is inserted into the puddle forming material 32 to connect the spool wire 44 and the puddle forming member 32. This completes the primary burying operation.

  The secondary burying operation following the primary burying operation is performed by filling the same slurry 38 as the primary burying around the wax pattern 42 and the spool line 44 ((VI) in FIG. 4, (VII) in FIG. 5). . In this secondary filling of the slurry, vibration may be applied to the assembly 40 composed of the former 30 and the casting ring 34 with a vibrator (not shown). When this secondary filling, that is, the secondary embedding process is completed, a cap 46 is installed at the upper end of the casting ring 34 ((VIII) in FIG. 5). Note that the cap 46 may be installed in the casting ring 34 before the secondary filling, and the slurry 38 may be filled into the casting ring 34 through the center opening 46a of the cap 46. When the secondary embedding process is completed, before the slurry 38 is cured, the assembly 40 with the cap 46 attached is attached to the centrifugal burying apparatus 50 ((IX) in FIG. 6). Since the part where the primary burying operation has been performed is already in a solidified state, the former 30 and the spool wire 44 (in the case of non-wax material) may be removed from the assembly 40 before being attached to the centrifugal burying apparatus 50. Good. Further, as described with reference to FIG. 1, the weight Wt may be placed on the slurry 38 before the assembly 40 is mounted on the centrifugal burying device 50.

  Also in the ethylsilicate investment material, as described above with reference to FIG. 1, the slurry 38 is filled into the assembly 40 in a single operation, and the centrifugal investment device 50 is used before the slurry 38 is cured. Then, the excess kneaded liquid may be separated from the slurry 38 by solid-liquid separation by centrifugal force. Thus, the method of ending the embedding by one slurry filling operation is preferably employed when the spool wire 44 is formed of a member (for example, a wire) that is not wax.

  7 and 8 are views for explaining the outline of the centrifugal burying device 50. FIG. Referring to FIG. 7, the centrifugal burying device 50 includes a rotating body 54 that rotates about a vertical central axis 52, and a holder 56 is installed on the rotating body 54. In order to maintain the rotational balance of the rotating body 54, the rotating body 54 is preferably provided with a pair of holding tools 56 at positions opposed to the radial direction. For example, if two pairs of holding tools 56 are provided, A total of four holders 56 are preferably arranged at intervals of 90 degrees.

  As shown in FIG. 8, each holder 56 has left and right horizontal shafts 58, 58 extending radially outward, and each horizontal shaft 58 swings on a bracket 60 (FIG. 7) of the rotating body 54. It is supported freely. In the centrifugal burying device 50, the rotating body 54 is driven to rotate about the central axis 52 by driving the electric motor 62. In this embodiment, the retainer 56 is formed of a circular ring, and the casting ring 34 of the assembly 40 is inserted into the circular ring-shaped retainer 56 from above, and radially outward of the upper end of the casting ring 34. With the protruding circumferential flange 34 c engaged with the upper end of the holder 56, the assembly 40 with the cap 46 or the casting ring 34 is swingably held like a swing. Depending on the size of the bracket 60 that receives the horizontal shaft 58 of the holder 56, if the assembly 40 or the casting ring 34 that is in a lateral position due to centrifugal force interferes with the rotating body 54, the interference portion of the rotating body 54 May be provided with an opening, that is, a window 64 (FIG. 7).

  As shown in FIG. 7, the centrifugal burying apparatus 50 includes a timer 66 and a manual switch 68, and the operation time of the motor 62 can be defined by setting the time with the timer 66. The manual switch 68 can control the on / off of the motor 62. When the power supplied to the electric motor 62 is turned off, the rotation of the rotating body 54 is braked by the brake 70 (FIG. 6). The brake 70 may be automatic control or manual control.

  The holder 56 is cast with the cap 46 when the assembly 40 with the cap 46 filled with the investment material (slurry 38) is held in the casting ring 34 or after the former 30 is removed from the assembly 40. When the ring 34 is held by the auxiliary jig 56, the center of gravity of the standing assembly 40 or the casting ring 34 filled with the slurry 38 is set to be positioned below the horizontal shaft 58. As a result, when the centrifugal burying device 50 is driven to rotate the rotating body 54, the assembly 40 or the casting ring 34 is brought into a lateral position by the centrifugal force due to this rotation, and the bottom of the casting ring 34 (in the solidified state). The primary buried side) is located radially outward, while the upper portion of the casting ring 34 (secondary buried side surrounding the wax pattern 10) is located radially inward.

  The centrifugal embedding apparatus 50 is operated for about 5 to 10 minutes to apply centrifugal force to the slurry 38 in the assembly 40 or the casting ring 34, and the excess kneading liquid is separated from the slurry 38 ((X in FIG. 6). )). This excess kneading liquid is unevenly distributed radially inward as described above due to the difference in specific gravity with the slurry 38. When the operation of the centrifugal burying device 50 is stopped, the assembly 40 with the cap 46 or the casting ring 34 held by the holder 56 returns to the upright posture, and the cap 46 (secondary burying surrounding the wax pattern 10). Side) is located on the upper side, and the bottom (primary buried side) of the casting ring 34 is located on the lower side. After removing the assembly 40 or the casting ring 34 with the cap 46 from the holder 56, the cap 46 is removed from the assembly 40 (the casting ring 34), and the assembly 40 or the casting ring 34 is inclined at an angle. The excess kneading liquid 72 that is raised inside is discarded ((XI) in FIG. 9). Thereafter, it waits for the slurry 38 to harden in the assembly 40 or the casting ring 34 from which the former 30 has been removed.

  When the ethylene silicate investment material is cured, the process proceeds to the next dewaxing step ((XII) in FIG. 9). In the dewaxing process, for example, a puddle forming material 32 made of a brazing material, the spool wire 44 and the wax pattern are removed using a pressure cooker. That is, the wax of the wax pattern 42, the spool wire 44, and the puddle forming material 32 is melted by exposing the ethylene silicate investment material 74 to the pressurized steam for 15 to 30 minutes in the pressure cooker, and flows out of the ethylene silicate investment material 74. Thus, the mold 76 is completed ((XII) in FIG. 9). Next, the process moves to a casting process ((XIII) in FIG. 9), and a molten metal is cast into the cavity 76a of the mold 76, whereby a dental cast product is formed.

  The following first to third methods exist in the process from the dewaxing process ((XII) in FIG. 9) to the casting process ((XIII) in FIG. 9). Any method can be adopted. The first method is a method in which casting is performed after drying the mold 76 in which the cavity 76a is formed through a dewaxing process using pressurized steam. The second method is a method in which casting is performed after the mold 76 in which the cavity 76a is formed through a dewaxing process using pressurized steam is completely baked in an electric furnace or a gas furnace to completely remove moisture. The third method is a method of performing dewaxing by heating in an electric furnace or a gas furnace, and casting into a mold 76 in which a cavity 76a is formed by this dewaxing.

  As described above, the example has been described by using the ethylene silicate investment material as an example of the investment material. However, even if it is a gypsum-based investment material or a non-gypsum-based investment material (typically, a phosphate-based investment material) it can. For example, when a gypsum-based investment material is employed, water is used as a kneading liquid, but excess water contained in the slurry can be separated by centrifugal force. In the above-described embodiments, the mold manufacturing method using the wax pattern has been described as an example, but it goes without saying that the present invention can be similarly applied even if a resin pattern is used instead of the wax pattern. When the resin pattern is used, the resin pattern is burned out in a dewaxing process.

  As can be seen from the above explanation, the investment material is used in the state of a slurry prepared by kneading the powder investment material and the kneading liquid, but it is not necessary to strictly control the mixed water ratio. Since the excess kneading liquid can be separated by centrifugal force, even if the operator roughly manages the water mixing ratio, it can be adjusted to the optimum water mixing ratio at the stage where the slurry is cured. Therefore, since the dispersion of the management of the water mixing ratio by the operator can be reduced by the centrifugal burying device, the expansion rate of the investment material can be made constant. Further, by applying centrifugal force to the slurry, the slurry can be pressed and solidified by this centrifugal force, so that a smooth casting surface mold in which the surface of the wax pattern 42 is finely transferred can be produced.

  10 and 11 show a modified example of the holder 56 described above. The holder 80 of this modification has a base 81 made of a stainless steel plate, and the above-described assembly 40 or the primary and secondary buried casting ring 34 is placed on the flat base 81 extending along the horizontal plane. Is placed (FIG. 10). When the casting ring 34 is placed on the pedestal 81, the ring-shaped pillow member 82 is first placed on the pedestal 81. The pillow member 82 can receive the small diameter part 34a which comprises the lower end part of the casting ring 34 (FIG. 11).

  The left and right ends of the pedestal 81 have a pair of left and right arms 85 extending upward, and a swinging shaft extending horizontally outward from the upper end portion of the arms 85, that is, a horizontal shaft 86 is integrally formed. The left and right horizontal shafts 86 are rotatably received in the inclined grooves 87a of the support column 87 standing along the left and right side edges of the rectangular window 64 of the rotating body 54. The support 87 is fixed to the inner wall of the rotating body 54.

  After the assembly 40 or the casting ring 34 is placed on the pedestal 81, the rotator 54 is rotated so that the pedestal 81 of the holder 80 swings radially outward like a swing by centrifugal force. When the rotational speed of the rotating body 54 increases, the pedestal 81 stands up along the vertical plane. That is, as in the case of the holder 56 described above, the assembly 40 or the casting ring 34 placed on the pedestal 81 is in a state of the side (see FIG. 6), and the slurry in the casting ring 34 (see FIGS. 10 and 11). Then, the centrifugal force is applied). 10 and 11 are diagrams for explaining a procedure for installing the casting ring 34 on the holder 80, and the empty casting ring 34 is illustrated.

DESCRIPTION OF SYMBOLS 10 Wax pattern 12 Spool line 14 Frustum 16 Casting ring 18 Investment material slurry 20 Hardened investment material 22 Cap 26 Assembly (cone and cast ring)
30 Former 34 Stepped casting ring 34c Upper end flange of casting ring 36 Rubber cup 38 Slurry of ethylene silicate investment 40 Assembly (former, casting ring)
42 Wax pattern 44 Spool wire made of wax material 46 Cap 50 Centrifugal embedment device 52 Central shaft 54 Rotating body 56 Holder 58 Holder horizontal axis 60 Bracket (receives horizontal axis)
62 Electric motor 72 Excess kneading liquid 74 Ethylene silicate investment material 76 Mold made from ethylene silicate investment material

Claims (9)

After the slurry prepared by adding a kneading solution to the powder investment material of the investment material and kneading is filled in the casting ring and surrounding the wax pattern or the resin pattern with the slurry, after the slurry is cured In the mold manufacturing method of manufacturing the investment material mold by performing a pattern removal process to remove the wax pattern or the resin pattern,
Excess kneading that separates the excess kneading liquid from the slurry by applying centrifugal force to the slurry in the casting ring by rotating the casting ring filled with the slurry along a circumferential path in a lateral position. Japanese liquid separation process;
After the excess kneading liquid separation step, the excess kneading liquid discharging step of discharging the excess kneading liquid in the casting ring from the casting ring;
A slurry curing step for curing the slurry after the excess kneaded liquid discharging step;
A mold manufacturing method using a wax pattern or a resin pattern, wherein the pattern removal process is performed after the slurry curing step.   The mold manufacturing using the wax pattern or the resin pattern according to claim 1, further comprising a weight placing step of placing a weight on the slurry in the casting ring before the excess kneading liquid separating step. Method. Prepare a kneaded slurry by mixing the kneading liquid into the investment material powder investment material,
A slurry filling step of filling the slurry into an assembly of a truncated cone and a casting ring and surrounding the wax pattern or resin pattern installed in the assembly with the slurry;
The centrifugal force is applied to the slurry in the assembly by rotating the assembly along a circumferential path in a state where the frustoconical portion of the assembly filled with the slurry is in a state of being laterally located radially outward. A centrifugal force application step of applying and separating excess kneaded liquid from the slurry;
After the centrifugal force application step, an excess kneading liquid discharging step for discharging the excess kneading liquid separated from the slurry from the assembly;
A slurry curing step for curing the slurry after the excess kneading liquid discharging step;
A mold manufacturing method using a wax pattern or a resin pattern, which includes a pattern removal processing step of removing the wax pattern or the resin pattern in the assembly to form a mold of the investment material after the slurry curing step. Prepare a kneaded slurry by mixing the kneading liquid into the investment material powder investment material,
A removable cap is prepared at the upper end of the casting ring of the truncated cone and casting ring assembly,
A capped assembly that surrounds the wax pattern or resin pattern installed in the assembly with the slurry and is equipped with the cap is attached to a centrifugal burying device, and the circumferential pattern on a horizontal plane is By rotating the assembly in a state where the frustoconical portion of the assembly is located laterally outward, centrifugal force is applied to the slurry in the assembly to separate the excess kneaded liquid from the slurry. A centrifugal force application step;
Taking out the assembly with the cap from the centrifugal burying apparatus, then removing the cap from the assembly and discharging the excess kneading liquid in the assembly; and
After the excess kneading liquid discharging step, it has a wax pattern removing treatment step of removing the wax pattern or the resin pattern from the investment material made by curing in the casting ring to make a mold. A mold production method using a wax pattern or a resin pattern characterized by the above. The cap has a central opening;
The mold manufacturing method using a wax pattern or a resin pattern according to claim 4, further comprising a slurry filling step of filling the slurry into the casting ring through the central opening of the cap prior to the centrifugal force applying step. . Prepare a kneaded slurry by mixing the kneading liquid into the investment material powder investment material,
A spool wire installation process for installing the spool wire on the truncated cone;
A casting ring installation step of installing a casting ring on the truncated cone;
A primary burying step of filling the slurry at the bottom of the casting ring and curing the slurry until the slurry solidifies;
After the primary burying step, a pattern installation step of installing a wax pattern or a resin pattern in a state connected to the spool line,
After the pattern installation step, a secondary filling step of filling the slurry in the casting ring and surrounding the wax pattern with the slurry;
A truncated cone removing step of removing the truncated cone from an assembly of the cast ring and the truncated cone surrounding the wax pattern with the slurry;
The casting ring that surrounds the wax pattern or the resin pattern with the slurry is attached to a centrifugal burying device, and the centrifugal burying device is operated so that the primary burying side of the casting ring is positioned radially outward in the lateral direction. A centrifugal force application step of separating the excess kneaded liquid from the slurry by revolving the casting ring on a horizontal plane and applying centrifugal force to the slurry in the casting ring;
Taking out the casting ring from the centrifugal burying apparatus and discharging the excess kneading liquid in the casting ring; and
A mold manufacturing method using a wax pattern or a resin pattern, comprising: a pattern removal process for removing the wax pattern or the resin pattern from an investment material made by curing slurry in the casting ring. The slurry in which the kneading liquid is mixed into the powder investment material of the investment material is filled in the casting ring, and the wax pattern or the resin pattern installed in the casting ring is surrounded by the slurry. A centrifugal embedding device for separating the excess kneaded liquid from the slurry by applying centrifugal force to the slurry in the casting ring,
A rotating body that is driven to rotate around a central axis linked to an electric motor;
A holder that is swingably provided on the rotating body,
When the casting ring filled with the slurry is attached to the holder, the center of gravity of the casting ring filled with the slurry is positioned lower than the swinging central axis of the holder,
When the electric motor is started and the rotating body is driven to rotate, the casting ring revolves around the horizontal axis in a lateral posture, and centrifugal force is applied to the slurry in the casting ring. Centrifugal burying device characterized by   The centrifugal burying device according to claim 7, wherein the holder has a pedestal for receiving the casting ring. The casting ring has a flange projecting radially outward at an upper end thereof;
The centrifugal burying device according to claim 6, wherein the holder has a ring shape that engages with the flange of the cast ring.

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